| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 32.7° | 21° | 14mm | 1.9 | 73 |
| February | 32.8° | 22.9° | 10.9mm | 1.7 | 73 |
| March | 33.4° | 24.9° | 42.3mm | 4 | 66 |
| April | 34.3° | 26° | 111.6mm | 6 | 59 |
| May | 34.4° | 25.8° | 151mm | 12.6 | 45 |
| June | 33.8° | 26.1° | 176mm | 13.3 | 46 |
| July | 33.3° | 25.8° | 200.2mm | 16.8 | 45 |
| August | 33.3° | 25.6° | 125mm | 14.9 | 45 |
| September | 32.9° | 24.9° | 302.6mm | 20 | 46 |
| October | 32.9° | 23.9° | 284.8mm | 19.3 | 46 |
| November | 33.5° | 22.7° | 71.7mm | 6.3 | 61 |
| December | 32.9° | 20.9° | 12.2mm | 1.9 | 73 |
January in Rayong averages a daily high of 32.7°C with nights around 21°C. Rain is rare — about 1.9 wet days and 14mm across the month. Generally workable, with some weather to plan around.
February in Rayong averages a daily high of 32.8°C with nights around 22.9°C. Rain is rare — about 1.7 wet days and 10.9mm across the month. Generally workable, with some weather to plan around.
March in Rayong averages a daily high of 33.4°C with nights around 24.9°C. Expect roughly 4 wet days totalling 42.3mm. Generally workable, with some weather to plan around.
April in Rayong averages a daily high of 34.3°C with nights around 26°C. Expect roughly 6 wet days totalling 111.6mm. Generally workable, with some weather to plan around.
May in Rayong averages a daily high of 34.4°C with nights around 25.8°C. Expect roughly 12.6 wet days totalling 151mm. Demanding conditions — pack for it and plan indoor options.
June in Rayong averages a daily high of 33.8°C with nights around 26.1°C. Expect roughly 13.3 wet days totalling 176mm. Demanding conditions — pack for it and plan indoor options.
July in Rayong averages a daily high of 33.3°C with nights around 25.8°C. Expect roughly 16.8 wet days totalling 200.2mm. Demanding conditions — pack for it and plan indoor options.
August in Rayong averages a daily high of 33.3°C with nights around 25.6°C. Expect roughly 14.9 wet days totalling 125mm. Demanding conditions — pack for it and plan indoor options.
September in Rayong averages a daily high of 32.9°C with nights around 24.9°C. Expect roughly 20 wet days totalling 302.6mm. Demanding conditions — pack for it and plan indoor options.
October in Rayong averages a daily high of 32.9°C with nights around 23.9°C. Expect roughly 19.3 wet days totalling 284.8mm. Demanding conditions — pack for it and plan indoor options.
November in Rayong averages a daily high of 33.5°C with nights around 22.7°C. Expect roughly 6.3 wet days totalling 71.7mm. Generally workable, with some weather to plan around.
December in Rayong averages a daily high of 32.9°C with nights around 20.9°C. Rain is rare — about 1.9 wet days and 12.2mm across the month. Generally workable, with some weather to plan around.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Rayong peaks at 73.
Based on 30 years of records, December–March scores highest for comfort in Rayong, balancing daytime temperature against rainfall.
May is the warmest, averaging a daily high of 34.4°C.
September is the wettest, averaging 302.6mm of rain across roughly 20 wet days.
January is the coolest month, with average daily highs around 32.7°C.